5
Water connections
1.
All plumbing work needs to comply with comply with the AS 3500:4 for plumbing and drainage
2.
The Hotrun-VE range of products can only be installed to a cold water supply operating pressure of
minimal 90 kPa and maximum of 600kPa. The 90 kPa pressure must remain under full flow conditions.
The minimum flow rate to operate these 3-phase models is 2.5 ltr/min. Connecting the Hotrun-VE to a low
pressure tank/rainwater system without pressure pump it likely to fail, ask Elwa for advice. The
minimum supply pressure needs to be secured at all times or the Hotrun can fail to switch on.
3.
Make sure that any flow restrictors in shower heads and the aerators in tap outlets
installed after the Hotrun are kept clean and make sure these cause minimal
backpressure to enable the Hotrun to switch on and off. The outlet back-pressure
needs to be less than the cold water inlet supply pressure, as the cold water can be
pushed back to the Hotrun when mixing cold water to the hot water and cause the
Hotrun to switch off.
4.
Connect to the water pipe-work only with the supplied flexible hoses that are supplied
with each Hotrun, hand t max.½ turn with a spanner. All Hotrun fittings and
flexible hoses are Watermark approved and have a flat seal connection. By using the
supplied flexible hoses you can avoid excessive tension on the Hotrun fittings. Damaging
water connections during installation is not covered by warrantee.
5.
The fitting with the blue arrow (in) is for the cold water inlet and the one with the red arrow
(out) is for the hot water outlet. Do not reverse the connections or the water heater!
6.
Always use a ½˝ BSP (100% bore) ball valve in the cold water supply for service purposes.
7.
Important: After installation open the water tap to flush the device to release all air from
the coil and check all connections before turning on the power supply to the water
heater. Failing to do so shortens the life-span of the electric elements. Replacement of
elements burning out during installation is not covered by warranty
.
8.
The Hotrun-VE range water heaters can be programmed to any temperature limit required. At
the time this manual was written only the 50°C limited models for sanitary fixings for personal
hygiene are exempted from the requirement of installing a TMV by the plumbing code of
Australia and a TMV is required for other applications (see fig.1). New legislation is underway
for all other temperatures that will eliminate the need to install a TMV in all applications.
9.
Further, any set temperature between 25 and 60°C as temperature limit can be programmed
into the water heater not to be changed by the end user after installation.
10.
Each water heater is supplied for exposed water and electrical connections.
However, water and electrical connections can also come in from the wall through the back
plate of the water heater (see template for positioning all connections prior to fitting the unit to
the wall). To do so, remove the inlet and outlet water connections and use the supplied
blanking grommets to close of the hole.
11.
The Hotrun-VE range needs to be installed on a water supply with a maximum inlet water pressure of
600kPa. If it is not guaranteed the pressure will be limited to 600kPa a pressure limiter to 600kPa (or less)
needs to be installed.
